rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6502/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=22673, q=743 ncpus=2)
task:syz.0.304       state:R  running task     stack:25904 pid:6502  tgid:6498  ppid:5547   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:srso_alias_safe_ret+0x0/0x7 arch/x86/lib/retpoline.S:171
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <48> 8d 64 24 08 c3 cc e8 f4 ff ff ff 0f 0b cc cc cc cc cc cc cc cc
RSP: 0018:ffffc900031af730 EFLAGS: 00000297
RAX: 0000000000000002 RBX: 0000000000000003 RCX: ffff888029fa5a00
RDX: ffffc9000c0ed000 RSI: 0000000000000003 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffffff8b8b830f R09: 1ffffffff25fdab8
R10: dffffc0000000000 R11: fffffbfff25fdab9 R12: ffffc900031af840
R13: 0000000000000003 R14: ffffc900031af858 R15: 1ffff92000635f0b
 srso_alias_return_thunk+0x5/0xfbef5 arch/x86/lib/retpoline.S:181
 xa_is_internal include/linux/xarray.h:175 [inline]
 xa_is_err include/linux/xarray.h:207 [inline]
 xa_err include/linux/xarray.h:226 [inline]
 xas_error include/linux/xarray.h:1431 [inline]
 xas_start+0x5f/0x7b0 lib/xarray.c:187
 xas_load+0x2c/0x5c0 lib/xarray.c:238
 filemap_get_entry+0x1f0/0x3b0 mm/filemap.c:1840
 shmem_get_folio_gfp+0x2a8/0x1f50 mm/shmem.c:1993
 shmem_get_folio mm/shmem.c:2171 [inline]
 shmem_write_begin+0x170/0x4d0 mm/shmem.c:2754
 generic_perform_write+0x39b/0x840 mm/filemap.c:4019
 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa74/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a3b9746df
RSP: 002b:00007f4a3c68ae00 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000100000 RCX: 00007f4a3b9746df
RDX: 0000000000100000 RSI: 00007f4a31600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000009de43
R10: 000000002009e802 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f4a3c68af00 R14: 00007f4a3c68aec0 R15: 00007f4a31600000
 </TASK>
rcu: rcu_preempt kthread starved for 10419 jiffies! g22673 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111